/*
 * Copyright (c) 2023 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/**---
description: >
  We can think of this feature - the ?? operator - as a way to "fall back" to a default value when dealing with null or undefined.
module: ESNext
isCurrent: true
---*/


import { Assert } from "../../../suite/assert.js"
let nn: number | null;
nn = 1408;
let str: string = "NARC";
let x = nn ?? str;

nn = null;
let y = nn ?? str;

Assert.equal(typeof x, "number");
Assert.equal(typeof y, "string");